Excessive Heat — Northern San Joaquin Valley, California

2022-09-04 to 2022-09-09 · Northern San Joaquin Valley, California

Event narrative

The Northern San Joaquin Valley saw high temperatures reach 102 to 115 degrees during the heat event, with all-time, monthly, and daily record highs set. The all-time record high of 115 for Stockton Airport was tied on the 6th, previously set on July 23, 2006. The monthly record high was broken, which was 114 on July 14, 1972. Daily records were also set on the 5th and 8th with highs of 112 and tied on the 4th with a high of 105, and 106 on the 9th. Stockton saw a mild low of only 79 on the 8th. Modesto Airport had a September record high of 112 set on the 6th, with daily record highs of 107 set on the 5th and 108 on the 8th, with a record-tying high of 107 on the 7th. Modesto saw a mild low of only 79 on the 8th.

Wider weather episode

Strong high pressure over interior northern California brought widespread high to very high heat risk to the region. Triple-digit high temperatures were observed across most of the Central Valley, Delta, and foothills through the first 9 days of September. The hottest temperatures were on September 5 and 6, when temperatures exceeding 110 were observed at many locations. All-time records were set on the 6th for Sacramento stations and tied in Stockton. Numerous daily and monthly record high-temperature were also set in the area. There was one death attributed to the heat in Sacramento County.

Source: NOAA Storm Events Database, event_id 1057561. Narrative written by the NWS forecast office that issued the report.